The Man Who Could Not Die (The Saint TV Series)

Plot
Adventurer Miles Hallin goes into partnership with Nigel Perry, a friend of Templar's whose father recently died. Following the death of a man suspected of blackmailing Hallin, Simon believes Hallin killed Nigel's father, and Nigel could be next. Hallin and Nigel set out for Wales with Templar in pursuit, to prove, or disprove Hallin's guilt, and to make sure no harm comes to Nigel.

Trivia

 * The "rocks" in the "cave" appear to be freshly painted.
 * Morton's motorcycle is a Triumph 650.

Origin
This episode was adapted from a novella of the same name from the 1931 book Featuring the Saint.